From nobody@FreeBSD.ORG Mon Oct 25 23:21:15 1999
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Date: Mon, 25 Oct 1999 23:21:15 -0700 (PDT)
From: work@scripty.com
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Subject: kernel panic on 64KB block size ufs filesystem when soft updates enabled
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>Number:         14536
>Category:       kern
>Synopsis:       kernel panic on 64KB block size ufs filesystem when soft updates enabled
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Oct 25 23:30:01 PDT 1999
>Closed-Date:    Thu Jan 17 08:04:36 PST 2002
>Last-Modified:  Thu Jan 17 08:04:37 PST 2002
>Originator:     Clinton Work
>Release:        FreeBSD 3.3-STABLE
>Organization:
CADVision
>Environment:
FreeBSD nntp.cadvision.com 3.3-STABLE FreeBSD 3.3-STABLE #0: Tue Oct 19 17:07:56 MDT 1999     root@nntp.cadvision.com:/usr/src/sys/compile/NNTP  i386

>Description:
I created an 8gig partition on a SCSI drive for the diablo news server.
I adjusted the file system parameters to 64KB block size, 8KB fragments
to improve performance. I also compiled soft updates into the kernel.
When you try to active soft updates on the filesystem (tunefs -n 
enable /dev/....) the kernel panics right away with a "dirty vbufs"
message. 
>How-To-Repeat:
newfs -b 65536 -f 8192 -i 262144 /dev/rda1s1e
tunefs -n enable /dev/da1s1e
<kernel panic "dirty vbufs">

>Fix:
Use the defaults when creating the filesytems with newfs. Soft
updates work fine with the default 4KB block size.

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: mike 
State-Changed-When: Fri Jul 20 19:24:33 PDT 2001 
State-Changed-Why:  

Does this problem still occur in newer versions of FreeBSD, 
such as 4.3-RELEASE? 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=14536 
State-Changed-From-To: feedback->closed 
State-Changed-By: sheldonh 
State-Changed-When: Thu Jan 17 08:04:36 PST 2002 
State-Changed-Why:  
Automatic feedback timeout.  If additional feedback that warrants 
the re-opening of this PR is available but not included in the 
audit trail, please include the feedback in a reply to this message 
(preserving the Subject line) and ask that the PR be re-opened. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=14536 
>Unformatted:
